Boolean Algebra with logic yes/no variables

I have a set of variables for my door/windows sensors which are yes or no.
How can i calculate something like (sensor1 or sensor2 or sensor3) to have one resulting variable to reflect if any window is open.
When i try with math expression in better logic i receive errors.
thanks

Have you tried zones?
And what are the variables for?

The variables are for the Status of all door sensors. Zones is Not an Option

Thatβs how realized it currently. Thanks.
I was just wondering if I could do it via math

Instead of Boolean variables, you can use numerical variables that can also be used for calculations.

Example:
β 12 windows and doors in total
β Numerical variable
β Closed = 0
β Open = 1

If a status of a door/window change from close to open then calculate 1 to the numerical variable. If a status of a door/window change from open to close then subtract 1 from the numerical variable.

Numerical variable = 0 (all doors/windows are closed)
Numerical variable = 1 (one door or window is open, 11 are closed)
Numerical variable = 2 (two doors or windows are open, 10 are closed)
Numerical variable = 12 (all doors and windows are open, none is closed)

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